Introduction
Tornadoes frequently occur in the United States, resulting in vast destruction and often injuries and death. They occur more often in the United States and Canada than in other countries with the most tornado-prone regions in the US being the central and southeastern states along a corridor sometimes called "Tornado Alley."
A tornado's destructiveness is derived largely from the wind speed within it. For this reason, meteoroligists rate tornadoes using a scale based on wind speed. In the US, tornadoes were originally rated on the Fujita Scale, and since February 2007 on the Enhanced Fujita Scale. The two scales cover slightly different speed ranges, but for practical purposes are the same. The enhanced Fujita scale is shown below.
The Enhance Fujita Scale
Rating |
Wind Speed |
Damage |
EF0 |
65–85 mph |
Light damage |
EF1 |
86–110 mph |
Moderate damage |
EF2 |
111–135 mph |
Considerable damage |
EF3 |
136–165 mph |
Severe damage |
EF4 |
166–200 mph |
Devastating damage |
EF5 |
>200 mph |
Incredible damage |
Origin
This dataset was derived from a dataset produced by NOAA's Storm Prediction Center. The primary changes made to create this dataset were the deletion of some columns, change of some data types, and sorting by date.
Column Definitions
- yr - 4-digit year
- mn - Month (1-12)
- dy - Day of month
- date - Datetime object (e.g. 1950-01-01)
- st - State where tornado originated; 2-digit abbreviation
- mag - F rating thru Jan 2007; EF rating after Jan 2007 (-9 if unknown rating)
- inj - Number of injuries
- fat - Number of fatalities
- slat - Starting latitude in decimal degrees
- slon - Starting longitude in decimal degrees
- elat - Ending latitude in decimal degrees (value of 0 if missing)
- elon - Ending longitude in decimal degrees (value of 0 if missing)
- len - Length of track in miles
- wid - Width in yards
References
NOAA Storm Prediction Center
WIkipedia - Tornado
Wikipedia - Fujita Scale
Wikipedia - Enhanced Fujita Scale